@mosamuels's RU58841 to finasteride switch claims, fact-checked

What does this video actually claim?

Mo Samuels tells viewers he stopped using RU58841 for hair loss and switched to finasteride instead. The video appears to explain his reasoning for abandoning the experimental topical antiandrogen in favor of the FDA-approved oral medication.

Without seeing the full video content, we can't analyze his specific claims about effectiveness or side effects. But the switch itself reflects a common pattern among men trying unregulated compounds before moving to proven treatments.

The video has gained significant traction with over 90,000 views, suggesting many viewers are interested in comparing these two very different approaches to male pattern baldness.

What's the difference between these treatments?

RU58841 is an experimental topical antiandrogen that was never approved by any regulatory agency. It was developed in the 1980s but clinical trials were discontinued, leaving no published human safety or efficacy data.

Finasteride is an FDA-approved 5-alpha reductase inhibitor that reduces DHT production by about 70%. The drug has been studied extensively since the 1990s.

The original finasteride hair loss trials (Kaufman et al., Journal of the American Academy of Dermatology, 1998) showed that 1mg daily increased hair count by 86 hairs per square centimeter over 48 weeks compared to placebo. About 83% of men maintained or increased hair count versus 28% on placebo.

Is RU58841 actually effective for hair loss?

Nobody knows because there's zero published human data on RU58841's effectiveness or safety. The compound exists in a regulatory gray area, sold by research chemical companies with no quality control.

Some online forums contain anecdotal reports, but these can't substitute for controlled trials. Users don't know the actual purity, concentration, or stability of what they're applying to their scalps.

The lack of human studies means we don't know the optimal dosage, application frequency, or long-term effects. Men using RU58841 are essentially participating in an uncontrolled experiment on themselves.

What are the real risks here?

Finasteride's side effect profile is well-documented from multiple large trials. Sexual side effects occur in 1.8% to 3.8% of users according to the original studies, though some men report persistent effects after discontinuation.

RU58841's risks are completely unknown. Without toxicology studies, users can't make informed decisions about potential cardiac, hormonal, or other systemic effects from topical absorption.

The compound's chemical structure suggests it could have anti-androgenic effects beyond the scalp if absorbed systemically. But again, no human data exists to quantify this risk.

What should you actually know about this switch?

Mo's decision to switch from an unregulated experimental compound to an FDA-approved medication makes medical sense. Finasteride has 25 years of post-market safety data and proven efficacy.

However, finasteride isn't risk-free. The drug can cause sexual dysfunction, depression, and cognitive effects in some users. These risks are small but real and documented.

Anyone considering hair loss treatment should consult a dermatologist rather than relying on social media advice. Topical options like minoxidil offer another evidence-based approach with different risk profiles than oral finasteride.